fix mathjax sitewide

Author: kmurphypolygon

docs/_site_essentials/stylesheets/extra.css

@@ -41,5 +41,4 @@ div.flex-figure div.flex-figure-left {
 div.flex-figure div.flex-figure-right {
 	flex-grow: 1;
 	flex-shrink: 1.5;
-}
-
+}

docs/js/katex.js

@@ -0,0 +1,10 @@
+document$.subscribe(({ body }) => { 
+    renderMathInElement(body, {
+      delimiters: [
+        { left: "$$",  right: "$$",  display: true },
+        { left: "$",   right: "$",   display: false },
+        { left: "\\(", right: "\\)", display: false },
+        { left: "\\[", right: "\\]", display: true }
+      ],
+    })
+  })